Altman Douglas G
Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Botnar Research Centre, Oxford OX3 7LD, UK.
Lancet. 2015 Aug 15;386(9994):636-7. doi: 10.1016/S0140-6736(15)61450-7.